I went RT. Functions a lot like my laptop minus all the problems associated with x86. I also enjoy the much higher resolution of the Surface 2 and the premium feel. The kickstand gets far more use than I originally thought and the full USB and micro-HDMI is great.

The two devices aren't all that similar, even accounting for the OS. The Dell is an 8" portrait-oriented, WiFi-only tablet while the Nokia is a 10" landscape tablet with 4G onboard. (before anyone says something, you can rotate both) Unless you use Java, specialized VPN software or want some other browser besides IE, Windows RT is not that bad. That said, it doesn't work for me for those reasons.

Dell venue pro ,as it has full windows desktop edition unlike windows RT
I could run my office remote connection, and this was the stuff I'm truly impressed , Now i dont need to carry my laptop for small trips
Moreover, i can install any exe files, and I could use my desktop wireless keyboard and mouse combo, using a small micro to usb convertor

I'm really happy with this purchase and I feel its a new beginning to Windows and downfall to Android/IOS
There are some bugs related to screen brightness, but it can be resolved by some change in settings.

I don't think we can honestly compare an 8" Windows 8.1 Core device with WiFi and no functional accessories to a 10" Windows RT tablet with WiFi, 4G/LTE, and a solid productivity accessory. They just aren't the same category of device and don't cater to the same market.

What gets me is the people who automatically say, "Stay away from RT - you won't be happy with it." How do you know? Your needs may be different than the person's who is asking the question. For me, no way - RT won't make me happy. For my wife, an RT tablet is what we're going to get her. It will meet all of her needs. Just because RT doesn't meet your needs doesn't mean it doesn't meet everyone's needs.

As for the OP, there are two questions that you need to answer before making this decision. First is whether RT will meet your needs, or if Windows 8 is what you need. Second is screen size - will the 8" Dell meet your needs, or do you need the larger size of the 2520 (assuming RT is good enough for you)? You can get more granular after that, but IMO those are the first two questions you need to answer before making a decision on a particular tablet. And if RT won't meet your needs, and 8" is too small, then look at other tablets.